/Engine/Plugins/FX/Niagara/Source/Niagara/Public/NiagaraEmptyUAVPool.h
Grab a temporary empty RDG Buffer UAV from the pool. Note: When doing this outside of Niagara you must be within a FNiagaraUAVPoolAccessScope.
FRDGBufferUAVRef GetEmptyRDGUAVFromPool ( [FRDGBuilder](API\Runtime\RenderCore\FRDGBuilder) & GraphBuilder, EPixelFormat Format )